1. Make sure that the gecko is housed alone in a quiet area, with plenty of hides and foliage.
2. Feed Pangea Gecko Diet with Insects: https://www.pangeareptile.com/store/...h-insects.html. There is also a fig flavored version of this food. Pick the flavor your gecko likes best. I have had great success with this food with a few picky eaters that were on the thin side due to not eating enough.
3. Be careful with the temperatures, especially during the warmer months of the year. Colder temps definitely result in less appetite, but too hot is more dangerous. 75 degrees is perfect (winter temps for adult geckos can be lower). I aim for 78 degrees as the max with cresteds (over 80 and you are in emergency range/risk of death).
4. Monitor poop and weight (with a digital scale if possible).
5. If no improvement in a few week to a month, consider seeing a reptile vet for a fecal exam to rule out internal parasites.
6. A few other notes--males do tend to be smaller. Do not expect a male to grow at the same rate as a female once sub-adult age is reached. If poop is runny, overly smelly, or looks off, visit a vet for a fecal asap. Assist feeding is fine to get a gecko used to a new food or to aid a thin animal, but do not make a habit of it or you risk having a gecko that relies on you to always hand feed it.
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